Results 271 to 280 of about 2,071,116 (352)
Metasurfaces and Metadevices for Topological Electromagnetic Waves
Advanced Physics Research, EarlyView.Optical topologies refer to diverse topological localized structures made by diverse parameters of light fields, such as vortices, skyrmions, and hopfions. This article navigates a direction of metasurface‐based integrated devices for generation, manipulation and detection of novel topologies of light, which would be a rapidly growing interdisciplinary
Rensheng Xie +3 more
wiley +1 more source
Broadband Duct Noise Reduction Using Multi-chamber Micro-perforated Panel Absorbers
Jiayu Wang +2 more
openalex +2 more sources
Multifunctional Metasurfaces for Bridging Terahertz Waves in Free Space and Waveguides
Advanced Physics Research, EarlyView.A multifunctional terahertz metasurface capable of simultaneous orthogonal polarization conversion and phase modulation is integrated onto a dielectric slab waveguide, thereby enabling efficient free‐space‐to‐guided‐wave coupling. By implementing tailored phase gradients on the metasurface, we demonstrate the formation of a focused spot within the ...
Jinhui Lu +5 more
wiley +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Multirotor broadband noise modulation
The Journal of the Acoustical Society of AmericaRotor broadband noise spectra are typically analyzed over time scales on the order of one or more rotor periods. However, modulation of the broadband noise spectrum with the blade passage frequency (BPF) has been shown to be significant for noise levels and perception of wind turbines and helicopters.
Ze Feng (Ted) Gan +3 more
openaire +2 more sources
A simultaneous perturbation stochastic approximation algorithm for broadband noise control.
Journal of the Acoustical Society of America, 2023Simultaneous perturbation stochastic approximation (SPSA) algorithm, an algorithm without secondary path modeling, has been applied to active noise control by some researchers.
Shanjun Li +4 more
semanticscholar +1 more source
Efficient computation of broadband noise propagation using Gaussian beam tracing method.
Journal of the Acoustical Society of America, 2022The Gaussian beam tracing method has advantages in computing long-distance noise propagation in outdoor environments due to its high efficiency. Usually, repeated computations are required if the target sound wave is broadband or contains multiple ...
Haoyu Bian +3 more
semanticscholar +1 more source
IEEE Microwave and Wireless Components Letters, 2021
This letter presents a fully integrated wideband, ultralow average noise figure (NF), low power consumption, compact, and electrostatic discharge protected 6.7–15.3-GHz low-noise amplifier (LNA). A peak-gain distribution technique with a large transistor
Han-Woong Choi +2 more
semanticscholar +1 more source
This letter presents a fully integrated wideband, ultralow average noise figure (NF), low power consumption, compact, and electrostatic discharge protected 6.7–15.3-GHz low-noise amplifier (LNA). A peak-gain distribution technique with a large transistor
Han-Woong Choi +2 more
semanticscholar +1 more source
Prediction of Urban Air Mobility Multirotor VTOL Broadband Noise Using UCD-QuietFly
Journal of the American Helicopter Society, 2021This paper investigates broadband noise of multirotor urban air mobility (UAM) vertical take-off and landing (VTOL) vehicles. Based on an earlier single-rotor trailing-edge noise prediction method, a multirotor broadband noise prediction program is ...
Sicheng Li, Seongkyu Lee
semanticscholar +1 more source
Active Control of Outgoing Broadband Noise Fields in Rooms
IEEE/ACM Transactions on Audio Speech and Language Processing, 2020Active noise control system has been actively researched over the past half century, and implemented to reduce noises in ducts, headsets, and inside several automobile models.
Fei Ma, Wen Zhang, T. Abhayapala
semanticscholar +1 more source